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-rw-r--r--dom/canvas/CanvasRenderingContext2D.cpp13
1 files changed, 9 insertions, 4 deletions
diff --git a/dom/canvas/CanvasRenderingContext2D.cpp b/dom/canvas/CanvasRenderingContext2D.cpp
index 4849fda57..2bf40732a 100644
--- a/dom/canvas/CanvasRenderingContext2D.cpp
+++ b/dom/canvas/CanvasRenderingContext2D.cpp
@@ -2406,7 +2406,11 @@ CanvasRenderingContext2D::SetStyleFromUnion(const StringOrCanvasGradientOrCanvas
}
if (aValue.IsCanvasPattern()) {
- SetStyleFromPattern(aValue.GetAsCanvasPattern(), aWhichStyle);
+ CanvasPattern& pattern = aValue.GetAsCanvasPattern();
+ SetStyleFromPattern(pattern, aWhichStyle);
+ if (pattern.mForceWriteOnly) {
+ SetWriteOnly();
+ }
return;
}
@@ -2581,11 +2585,12 @@ CanvasRenderingContext2D::CreatePattern(const CanvasImageSource& aSource,
nsLayoutUtils::SurfaceFromElement(element,
nsLayoutUtils::SFE_WANT_FIRST_FRAME, mTarget);
- if (!res.GetSourceSurface()) {
+ RefPtr<SourceSurface> surface = res.GetSourceSurface();
+ if (!surface) {
return nullptr;
}
- RefPtr<CanvasPattern> pat = new CanvasPattern(this, res.GetSourceSurface(), repeatMode,
+ RefPtr<CanvasPattern> pat = new CanvasPattern(this, surface, repeatMode,
res.mPrincipal, res.mIsWriteOnly,
res.mCORSUsed);
return pat.forget();
@@ -4895,8 +4900,8 @@ CanvasRenderingContext2D::CachedSurfaceFromElement(Element* aElement)
res.mSize = res.mSourceSurface->GetSize();
res.mPrincipal = principal.forget();
- res.mIsWriteOnly = false;
res.mImageRequest = imgRequest.forget();
+ res.mIsWriteOnly = CheckWriteOnlySecurity(res.mCORSUsed, res.mPrincipal);
return res;
}